lowden



2 Sheets-Sheet 1.

D. R. LOWDEN. Lamp. No. 226,089

far affimey Patented Mar. 30, 1 880 N; PEIERS, PHOTO-LITHQGRAPHEH. wnsmumom D C,

F F ICEQ DICKSON R. LOVVDEN, OF PHILADELPHIA, PENN SYLVANIA,

LAMP.

SPECIFICATION formingpart of Letters Patent No. 226,089, dated March 30, 1880.

Application filed October 9, 1879.

To all whom it may concern:

Be it known that I, DICKSON R. LOWDEN, a subject of the Dominion of Canada, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Lamps, of which the following is a specification.

My invention is applicable to lamps of various kinds, such as chandelier, bracket, or table lamps; but it is especially suited to chandelier-lamps, as it admits of any desirable number of burners, as will hereinafter fully appear.

My invention, in the first place, consists of a vapor-chamber with the upper end of the wick chamber or tube, for the escape of vapor to prevent explosion, the chamber having an inner and an outer wall provided with perforations for the outward passage of the vapor from the wick-chamber, and a fire-proof filling, as hereinafter described.

The invention, in the second place, consists of a supplemental oil-reservoir located on the supply-pipe, in combination with the main reservoir, to augment the supply of oil and thus avoid the refilling of the lamp for a long burning.

I am aware that it is not new to combine a safety-chamber with the wick-chamber for the purpose of preventing the accumulation of vapor; but I am not aware of any constructed like mine and provided with a fire-proof fillin g, which is an essential feature in my invention.

Different kinds of oil may be used in this lamp but it is especially suited to light oils.

In the accompanying drawings, which make a part of this specification, Figure l is a vertical section of my improved lamp with the burner and supplemental fluid-reservoir left off. Fig. 2 is a horizontal section of the wickchamber 0 and vapor-chamber d at the line a: a: of Fig. 1. Fig. 3 is a vertical section of the hollow base of the burner. Fig. 4 is a horizontal section at the line y yof Fig. 3. Fig. 5 is an end view of the fitting D on an enlarged scale. Fig. 6 is a top view of the same. Fig. 7 is a modification of my improved lamp.

Like letters of reference in all the figures indicate the same parts.

A is the reservoir, from which the fluid is fed to one or more burners.

B is a supply-tube, which automatically feeds the fluid from the reservoir to the wickchamber 0.

In Fig. 1 the supply-tube is straight, except at its outer end, and is arranged horizontally and in the side wall of the reservoir at or about half-way down. The inner end of the tube has a screw-connection with the fitting D, (which is shown in detail in Figs. 5 and 6,) the bulb of the fitting being connected, by means of the vertical opening a, with the central tube E of the reservoir. As the fitting is employed merely for the connection of the inner end of the tube B and the upper end of the short tube B, which forms a continuation of the fluid-passage b, it may be otherwise connected to the interior of the reservoir, if desired. The lower end of the tube rests upon the lower plate of the reservoir; but it is cut off slantingly to admit the upward passage of the fluid.

The passage 1) of the tube B is continued outward from the reservoir, and has a downward turn to the lower end of the wick-chamber G by means of the short tube B the upper end of which is connected with the outer end of the tube B,which abuts against the wick chamber, and its lower end with the lower end of said chamber, as represented in the drawings; but, if desired, the tube B may extend through the wall of the chamber and pass down in the inside to the lower end of the same; or the short tube B may connect with it in the inside of the chamber, instead of at its outside, as represented.

G G are braces which connect with tube B and the Wick-chamber O.

In Fig. 7 a modification in the form of the supply tube B and its connection with the reservoir A and wick -chamber (J is represented, the ends of the tube being bent downward, and the inner end connected with the lug c on the bottom plate of the reservoir, and 5 the outer end with the lower end of the wickchamber.

In the employment of either form of the supply-tube B the fluid will be fed by its own pressure when the reservoir is half-full. When it sinks below that point the tube will have a siphonic action, and hence the constant and uninterrupted feeding of the fluid to the wickchamber may always be relied on.

To prevent the accumulation of vaporin the wick-chamber I form an annular vapor-chamher, (1, around the upper end of the wick-chamber, as seen in Fig. 1, by means of the hollow ring H, which is open at its inner circumference, the outer surface of the wall of the wickchamher forming the inner surface of the chamber. The inner and outer walls of the vapor-chamber have vent-holes c and e, which admit of the outward passage of the vapor from the wick-chamber. The interior of the wick-chamber is protected against the action of fire or flame from the outside by means of the wiregauze ring I. (Shown in Figs. land 2.)

A modification ot' the vapor-chamber (I is shown in Figs. 3 and 4, in which the rings J and J form the inner and outer walls of the chamber, respectively. The wire-gauze ring I is arranged in like manner as in the chamher formed by means of the hollow ring E. This chamber is adapted to be placed intermediately between the wick-chamber and the burner, the screw-ringf being connected with the upper end of the wick-chamber and the burner with the cap-plate h.

In the several places where the wire-gauze is shown, instead thereof asbestus or other material which will admit of the escape of vapor and protect the interior of the wick-chamber against the action of fire or flame may be used.

A (shown in Fig. 7) is a supplemental reservoir, to be used, in connection with the res ervoir A, on such occasions as the latter would not hold fluid enough to last through the time required. It is provided with a supply-tube, L, and a vent-tube, M, the ends of which are connected with the reservoir A.

It will be seen that as the fluid in the main reservoir A becomes exhausted an automatic supply is made from the supplemental reservoir through the tube L.

I claim as my invention 1. In combination with the wick-chamber of an oil-lamp, a vapor-chamber having an inner and an outer wall, each provided with one or more perforations, and an asbestus or wiregauze filling, or an equivalent, between the walls, substantially in the manner and for the purpose set forth.

2. The ring H, in combination with the wickchamber 0, forming the vapor-chamber (1 around the wall of the wick-chamber, there being one or more perforations through said wall and through the wall of the ring for the escape of vapor, and wire-gauze I, or its equivalent, in said vapor-chamber, substantially as and for the purpose set forth.

3. The supplemental reservoir A, located on the supply-pipe, as shown, having a supply-tube, L, and vent-tube M, in combination with the reservoir A, for increasing the supply of oil at a single filling, substantially as set forth.

DIOKSON R. LOWDEN.

YVitnesses:

TrroMAs J. BEWLEY, STEPHEN USTICK. 

